Hail in Flat Rock Apr 27, 2026
Both radar surfaces caught this storm: NEXRAD logged 8 hail signatures up to 0.75", and the radar-estimated size reached 0.5" aloft.
0.75"
≈ penny to nickel · the largest NEXRAD radar signature214
0
none filedThe 6th most severe storm Flat Rock has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Hail size
- 19 /100
- Homes exposed
- 47 /100
- Ground truth
- 0 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Flat Rock saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
Where Apr 27, 2026 sits in Flat Rock's hail record
This was Flat Rock's 4th recorded hail day, arriving 36 days after the Mar 22, 2026 storm. By severity it ranks 6th of the 8 storms we have logged here. Radar put the day's largest stone over Flat Rock at 0.75" — the largest NEXRAD radar signature.
The Apr 27, 2026 convective day was bigger than Flat Rock: the same system put hail over 1,188 other tracked cities, 336 of them in Illinois. Nearest: Lawrenceville (10 miles south, up to 2"); Oblong (11 miles west, up to 1"); Oaktown (11 miles east, up to 1").
These maps are stills from Flat Rock's Apr 27, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
What people on the ground reported
These are storm reports filed with the National Weather Service and released through the NOAA Storm Prediction Center — public-domain observations from spotters, the public, and NWS surveys. We quote each one exactly as filed.
No ground reports were filed with the National Weather Service for this storm over Flat Rock. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
What 0.75" hail means for Flat Rock roofs
Hail this size sits right at the edge of the National Weather Service severe threshold. Newer roofs usually shrug it off, but aging or already-worn shingles can bruise, and soft metals — vents, flashing, gutters — often show the first dents.
$2.6M
Potential roof exposure — 214 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Track hail over Flat Rock on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Flat Rock storm history — this Apr 27, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
8 recorded storm days in Flat Rock, IL
Other storms in Flat Rock
Jul 27, 2026
1.75"
Jul 26, 2026
0.5"
Jun 17, 2026
0.5"
May 16, 2026
1.25"
Mar 22, 2026
1.75"
Mar 4, 2026
2"
Feb 19, 2026
1"